Reel for moving picture films



' Aug. 18,1936. J. M. GOLDBERG REEL FOR MOVING PICTURE FILMS Filed Oct. 25, 1934 Patented Aug. 18, 1936 UNITED STATES PATENT. OFFICE 2,051,334 REEL FOR ovmc PICTURE ms Jacob Goldberg, Denver, Colo. Application October 25, 1934, Serial No. 749,896

r 3 Claims.

This invention relates to improvements in reels for moving picture films.

For the use with moving picture machines, especially of the type designed for home use, it is desirable to have reels that are light in weight, but which are rigidly constructed, and therefore it is customary to employ aluminum for this purpose. Since aluminum is a soft metal that is not very well adapted to resist severe strains and wear, experience has shownthat-such reels-will wear with exceptional rapidity at the center opening where they are attached to the shaft of the rewind apparatus.

It is the object of this invention to produce a' reel construction which shall make it possible to successfully employ aluminum for the greater portion of the reel and to reenforce the aluminum parts with steel plates at the points where the wear occurs.

Anotm fiject is to construct a moving picture reel of aluminum and to provide a perforated plate of steel or other wear resisting material so positioned that it will receive the strains and wear due to the action of the rotating driving I Having thus briefly set forth the objects of the invention and briefly described the construction, the same will now be described in detail, and for this purpose reference will be had to the accompanying drawing in which the preferred construction has been illustrated, and. inwhich:

Fig. l is a side elevation of the improved reel, on a reduced scale, showing the same fully assembled;

Fig. 2 is a side elevation of the center portion of the reel showing the parts in substantially full size, the outer ends of the spokes and the rim having been broken away; a V

Fig. 3 is a section taken on line 3-4; Fig. 2; Fdig. 4 is a section taken on line H, Fig. 1;

Fig. 5 is a section, to a reduced scale taken on line 5-5, Fig.1.

Each reel consists of .two substantially identi-.

spokes I and a center depressed portion 8. The depressed center portions .are offset with respect to the surrounding parts of the side members a distance substantially equal to one-half the width of the film and which distance has been designated by reference character a in'Fig. 3. when the two side members are connected with the.

bottoms of the depressed portions in contact as 65 shown in Fig. 3,'t he side members'are spaced a calsidemembers,eachofwhichhasarim5,

distance equal to 2a,-which isslightly greater than the width of the film with which" the reel I is to be employed. The bottom of each depressed area is provided with an opening 9. Located in each of the depressed areas is a hub member or 5 side plate which has been designated by reference numeral H). The periphery of each hub memher, which has been designated by reference numeral I I, is ofiset with respect to the central portion thereof and the annular surface thus formed 10 rests on the bottom of each depressed area and the two hub members and the side members are secured in assembled relation by means of rivets l2. The central portion of each hub member is offset from the adjacent bottom portion of the 15 depressed area in which it is located and a steel plate I3 is secured tothe inside of each hub member ill in the manner shown in Fig. 3. The steel plates i3 are held in place by means ofrivets l4.

In order to prevent relative rotation between the spindle of the rewind apparatus and the reel, the latter is provided with a noncircular opening for the reception of the rewind spindle, and in this drawing the central opening has been designated by reference numeral l5 and has-been indicated as being substantially rectangular and provided with outwardly extending projections 16. The spindle that cooperates with the reel isformed so as to fit the opening and therefore relative rotation cannot take place. The strain produced by the rewind apparatus is usually suflicient to very quickly wear away the aluminum of which the hub members or side plates are made, but by applying to the inside of each hub member a steel plate l3, this steel plate resiststhe force produced by the operation of the rewind apparatus and prevents the rapid wear that would otherwise take place if the aluminum hub members were left unreenforced. The rims C are transversely concaveas shown in Fig. 4 and the spokes I are also transversely concave as shown in Fig. 5, so as to give strength to the construction.

From the above description, taken in connection'with the drawing, it will appear that the construction permits substantially all of the reel to be made from light aluminum, and by reenforcing the hub members or side plates II at the points where'wear usually takes place, the advantage of so aluminum, as far as weight is concerned, can-be retained and at the same time all theadvantages of a heavy steel plate construction can be had-as far as wear resisting properties are concorned. 

